448 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.49. 



Doctor Stearns in reviewing the West American species of the 

 genus ^ expressed the opinion that several of the above-mentioned 

 species are synonymous with that of Sowerby. A considerable series 

 having accumulated in the national collection, the present writer is 

 of the opinion that the variations exhibited, taken in connection 

 with the fact that many years' collecting has not discovered any 

 other species of this type in the region referred to, cover fairly weU 

 the figures of the several nominal species, and in default of typically 

 named specimens authorize the presumption that the names cited in 

 the synonymy represent only individual mutations of one species. 

 Until further information to the contrary shaU have been received 

 it will be best so to consider them. 



The familiar and appropriate name argentaria, given by Conrad, 

 will therefore have to be retired in favor of the earher ■planiuscula 

 of Sowerby. 



PERIPLOMA DISCUS Steams, 1890. 



Distribution. — Type locaHty, San Pedro Bay, CaHfornia. Cat. No, 

 126931, U.S.N.M. 



PERIPLOMA CARPENTERI Dall, 1895. 



Distribution. — Type locality, Panama Bay, in 210 fathoms. Cat. 

 No. 106891, U.S.N.M. 



PERIPLOMA STEARNSII Dall, 1895. 



Distribution. — Type locality, Gulf of Cahfornia, in 24 fathoms. Cat. 

 No. 110548, U.S.N.M. 



PERIPLOMA (HALISTREPTA) SULCATA Dall, 1904. 



Distribution. — Type locaHty, San Pedro Bay; Terminal Island and 

 vicinity, California. Cat. No. 109318, U.S.N.M. 



Family PANDORIDAE. 



Genus PANDORA Hvirass, 1795. 



Subgenus KENNERLYIA Carpenter, 1864, 



KENNERLYLA GRANDIS Dall, 1877. 



Distribution. — Tliis species ranges from the vicinity of the Pribilof 

 Islands, Bering Sea, south and eastward to Sdetz Bay, Oregon. Cat. 

 No. 171069, U.S.N.M. 



This is the largest species of the genus, though sometimes nearly 

 approached by the allied K. wardiana A. Adams, of Japan. It is 

 also found fossil in the Pleistocene of Santa Monica, California. 



KENNERLYLA GLACIALIS Leach, 1819. 



Distribution. — ^Arctic Sea at Point Belcher, and south to Fuca 

 Strait. Cat. No. 73514, U.S.N.M, 



This is also reported from Spitsbergen and was originally described 

 from Greenland seas. 



I Proc. U. S. Nat. Mus., vol. 13, No. 813, pp. 222-224, 1890. 





